Deep Sky Object in Spring
NGC3640 (Galaxy in Leo)


Date & Time: Mar 3 2006, from 22:45 to 23:17 JST(+0900)にかけての10分露出4コマをコンポジット
Composed 4 shots with 10 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D70 (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...12bit CCD-RAW, converted to 16bit TIFF(3008×2000)
CCD Sensitivity...ISO1250




NGC3640 / Galaxy, type E3
R.A.11h 21m 6.7s (2000.0)
Dec.+03° 14' 08" (2000.0)
Apparent Size4.0×3.2'
Radial Velocity+1662km/s
Magnitude11.3
Distance85 million light yrs.
Group of GalaxiesLeo II-NGC3640 Group
Other IDsUGC6368, MCG1-29-33
CGCG39-130, PGC34778
A small elliptical galaxy at the tip of Leo's hind leg has a number of NGC3640. The galaxy has a long axis of 4 arc minutes and a visual brightness of 11.3th magnitude. We cannot detect no striking structure in the galaxy. And there is a compact galaxy of NGC3641 just 2 arc minutes south of NGC3640.




NGC3621

NGC3672


Copyright(c) 2006 by Naoyuki Kurita, All rights reserved.
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